Using the DeWalt DCN623B 20V Max 23Ga Pin Nailer is a piece of cake. First, make sure you have the right 23 Ga. pin nails in the correct length (between 5/8' and 1 - 1/2'). Load the nails into the nailer. Then, if you have a compatible battery, insert it. Point the nailer at the area where you want to drive a nail and press the trigger. The tool - free depth adjust feature allows you to set the nail depth according to your needs. If you encounter a jam, don't worry. Just use the tool - free jam release to fix it. When the LED indicator lights up, it's time to reload the nails. As for maintenance, keep the nailer clean after each use. Wipe off any dust or debris. Store it in a dry place. Also, remember that this is a bare tool, so you need to buy a battery and charger separately. And you're covered by a 3 - year limited warranty, a 1 - year free service contract, and a 90 - day money - back guarantee, so use it with confidence.